Rocker-joint.



PATENTED JULY '7, 1903.'

0. G'. MOORE.

ROCKER JOINT. APPLIoATIoN HLED APB. 1,8, 1902.

2 SHEETS-SHEET l.

N0 MODEL.

W/TNESSES A from/5m.

No. 733,327. PATENTBD JULY v, l1903.

O. O. MOORE. l Y

vROCKBR JOINT.

APPLICATION HLBD APB. 1s, 1902'.`v

0?]10 Cil/[00719.

UNITED STATES Patented July 1903.

PATENT OFFICE.

OTHO C. MOORE, OF NORFOLK, VIRGINIA, ASSIGNOR OF ONE-HALF TO JAMES BARKLEY, OF NORFOLK, VIRGINIA.

HOOKER-JOINT.

SPECIFICATION forming part of tters Patent No. 733,327', dated July 7, 1903.

Application led April 18, 1902.

-Serial No. 103,590. (No model.)

To all whom t may concern.'

Beit known that I, OTHO O. Mootmresiding at Norfolk, in the county of Norfolk and State of Virginia, have invented a new and Improved Rocker-Joint, of which the following is a specification.

My invention seeks to provide a simple, inexpensive, durable, and effective means for controlling the action of platform rockingchairs, cradles, nursery-cribs, or other like apparatus requiring similar motion.

My present invention in its generic nature comprises two castings or stamped metal members, one for the base or stationary member of the rocking-chair or other like object and the other for the rocking member supportable upon the base member, said two members being especially designed to cooperate with each other iu a manner Whereby to provide for an easy, uniform, and safe rocking action and to maintain the rockers from spreading during motion or at rest and to permit the said rocker members to operate without danger of bindingat any pointin the operative position without the use of springs or equivalent devices.

My invention in its more subordinate nature consists in certain details of construction and peculiar combination of parts, all of which will hereinafter be fully described, and specifically pointed out in the appended claims, reference being had to the accompanying drawings, in which- Figure l is a longitudinal section of a portion of a rocking-chair equipped with my improved rocker-joint. Fig. 2V is a detail perspective view of the joints applied for use. Fig. 3 is an elevation of said joint, the rocking member being shown tilted to its extreme movement in one direction. Fig. 4. is a transverse section of the same on the line 4 4 of Fig. 2. Fig. 5 is a detail perspective view of the lower or stationary joint member. Fig.

6 is a side view, and Fig. 7 a cross-section on .the line 7 7 of Fig. 6, of a modified construction of my invention, hereinafterreferred to. Fig. 8 is a side view of the construction shown in Figs. 6 and '7, the rocker member being shown tilted.

,In the practical application of my invention the same comprises two members A and B, of metal, cast., stamped, or otherwise formed. The member A, which hereinafter will be termed the stationary member, is fixedly secured to the inner side of the stationary or base frame G in any suitable manner. Fo provide a rigid bearing for the member A, its bottom end is widened, as at d, and curved to lit iush with the concaved upper edge of the base O, as shown. The upper end of the 'member A is extended a suitable distance above the base C, and the said upper end is formed with a V-shaped slot l, the inner or bearing surface la of which is concaved in cross -'section, the reason for which will presently appeal'. Near the ends of the V-slot the member A has inwardlyprojecting hubs ctx, to which the ends 3a 3a of a curvedguard member 3 are secured. Between the curved guard 3 and the slotted portion of the member A is slidably held the pendent end b of the upper rocker-joint member, the upper end of which is tixedly secured to the rocker-frame D.

The member b has a concaved central seatA b', that opposes the concaved surface of the V-slot in the member A, and in said seat is held a ball-bearing 4, adapted to ride on the V-slot and which forms, as it were, an inwardlyextending projection for the end b of member B for engaging the V-slot and properly guiding the said end b in its movements over the member A. l The angularity of the V-shaped slot, the length of the two branches of said slot, and the correlative opposing concaved surfaces of the members O and D in practice are so disposed and coperate in such manner that when the rocking frame D is tilted to the extreme forward motion the ball-bearing projection on the stem or part b of the member B will engage with that end of the branch of the V-s1ot at the tilted side of the rocker-frame D, (see Fig. 3,) and When said frame is rocked to the limit in the other IOO the end of the other branch of the V-slot, and hence a further tilting of the frame D beyond a predetermined limit is avoided. To further prevent undue tilting of the member D and to also hold the several parts from undue lateral motion or strain, a supplemental connecting member 5 is provided in the nature of a fiat bar havinga pivotal connection with the base C at one side of the member A, held to extend over the member A, and pivotally joined at the other end and at the other side of the member A to the rocking member D. The connection of the member 5 is such relatively to the opposing curved faces of the members C and D and the upper end of the member A that the member D reaches the limit of its tilt in the rearward direction before the pivotal point as of the said member 5 reaches the horizontal plane of its pivot-point y, and said point .fr when the member D is tilted to its limit in the other direction engages the u pper end of member A. (See Fig. 4.)

In Figs. 6, '7, and S I have illustrated a modified construction of my invention which differs from the preferred construction in that the member AX has an integral centrallydisposed and upwardlyextending arm 10, and the member BX has a body portion 20, that straddles the arm lO and has its upper edge formed with an inverted-V-shaped projection to cooperate with a stud 10 on the arm l0. ln this modified form the member AX has a vertical bifurcated extension 10c, and adjacent said extension the member has a concaved seat l0e in a plane with the eX- tension 10C. At each end the member BX has an inwardly-extending tiange 20d, the inner edges of which have integral apertured ears 2Oc to receive the fastening-screws 40, and said member BX also has a concaved seat 20X to engage and rock on the bifurcated extension l0c of the part AX when it (the member BX) is shifted to one of its tilted positions. At the end opposite the seat 10e the member AX has an upwardly-extending lug 10X to eooperate with the concaved portionv 20g on the member BX, and in line with thesaid seat 2Og said member BX has an outwardly-projecting bifnrcated iiange 2Oh in a plane with the bifurcated extension 10C of the member AX. Two supplemental members (indicated by 50 and 50X) are used in this modified form that cross and connect with bifurcated portions of the two members AX and BX and which serve practically the same function as the supplemental connection shown in Fig. 5.

From the foregoing description, taken in connection with the accompanying drawings, it is thought the operation and advantages of my invention will be readily understood by those skilled in the art to which it appertains.

It will be noticed in my construction of rocker-joint that no springs or other like means are necessary to control the oscillatory movement of the rocker, and by reason of the peculiar construction of the said joint the rocker-f ram es are maintained in perfect vertical alinement with the base portions without material lateral strain on ythe parts.

Further changes in the details of construction of my invention may be made without departing from the scope of the appended claims.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is y l. In a rocking-chair, the combination with two opposing members one of which rockably engages the other, of a casting rigidly secured to one of the opposing members and projected at right angles therefrom, said casting having a V-shaped bearing, a second casting rigidly connected to the other member, a member carried by the said second casting for engaging and riding in the aforesaid V-shaped bearing, means for holding the two castings in a cooperative arrangement, said means including a link member pivotally joined at one end to one of the opposing rocker members at one side of the V-shaped bearing and similarly joined at the other end to the other opposing member at the other side of the V-shaped bearing, as set forth.

2. A joint for rocking-chairs comprising a base portion having a verticallyextended member, a rocking frame mounted upon the Vbase portion having a member for opposing the said vertically-extended member of the base, one of the said members having a V- shaped guide-surface, a supplemental member carried by the other members for engaging the V-shaped guide-surface, and a supplemental means for limiting the tilt of the rockerframe, said means consisting of the link 5, secu red at one end to the base, and at the other end to the rocking frame, and the curved guard 3, and the stops CLX at the ends thereof, secured to the vertically-extended member of the base, all being arranged substantially as shown and for the purposes described.

3. The combination with the base C, and the member A, secured centrally thereof, and projected vertically therefrom, said member having a V-shaped slot in its upper end in a plane with the base C, said slot being concaved in cross-section; of the rocking frame D, the member B xedly secured thereto, said member having a pendent portion adapted to project over the slotted end of the member A, said projected portion havinga concaved seat in line with and opposing the V-shaped slot in the member A, a ball-bearing held in the said seat and slot, and means for holding the member B up against the member A, all being arranged substantially as shown and for the purposes described.

OTHO C. MOORE.

Vitnessesz- F. M. PAYNE, W. H. T. LYALL, R. CALVERT TAYLOR.

IOC

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